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Microchip Technology MIC5381-M4YFT-TR
- Part No.:
- MIC5381-M4YFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFQFN, 6-TMLF®
- Datasheet:
-
MIC5381-M4YFT-TR.pdf
- Description:
- IC REG LINEAR 1.2V/2.8V 6TMLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC5381-M4YFT-TR from Micrel is a dual-channel, fixed-output low-dropout linear regulator IC delivering 150mA per channel with independent enable control and auto-discharge functionality. It features VOUT1 = 2.8V and VOUT2 = 1.2V, ±1% typical output accuracy, 155mV dropout at full load, and operates from 2.5V to 5.5V input. Designed for compact portable power rails, it powers core logic and I/O in space-constrained handheld devices.
For engineers reviewing the MIC5381-M4YFT-TR datasheet, MIC5381-M4YFT-TR pinout, MIC5381-M4YFT-TR application, or MIC5381-M4YFT-TR equivalent, this device supports dual-rail sequencing, zero-off-mode shutdown (0.05µA), and stable operation with 0402 1µF ceramic capacitors - critical for battery-powered medical and consumer electronics design.
Technical Context
The MIC5381-M4YFT-TR integrates two independent CMOS-based LDO regulators sharing a common VIN and GND, each with dedicated active-high EN pins. Its internal reference and error amplifier deliver tight regulation across –40°C to +125°C, with line regulation of 0.3%/V and load regulation of 1% over 100µA–150mA.
Unlike the MIC5380 variant, the MIC5381-M4YFT-TR includes an integrated 30Ω NFET auto-discharge circuit per output, activated when EN1/EN2 are low - enabling rapid capacitor discharge without external components. This architecture eliminates hold-up voltage during power-down sequences in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | VOUT1 = 2.8V, VOUT2 = 1.2V - fixed, non-adjustable outputs optimized for core/I/O rail separation in SoC-based designs. |
| Max Output Current | 150mA per LDO - sufficient to power DSP cores, camera modules, or USB PHYs without thermal derating in 1mm² footprint. |
| Dropout Voltage | 155mV at 150mA - enables >95% efficiency at 3.6V input → 2.8V/1.2V outputs, critical for Li-ion battery discharge curves. |
| Ground Current | 32µA per LDO (active), 0.05µA (shutdown) - minimizes quiescent drain in always-on subsystems like RTC or sensor hubs. |
| PSRR | 60dB at 1kHz - suppresses switching noise from DC-DC converters feeding VIN, improving signal integrity in RF-sensitive applications. |
| Auto-Discharge | 30Ω internal NFET per output - discharges 1µF output caps in <1ms, preventing unintended wake-up or latch-up in powered-down states. |
| Package | 6-pin 1mm × 1mm Thin MLF® - RoHS-compliant, halogen-free, NiPdAu lead finish; pin 1 marked with ▲ for orientation. |
Pinout & Package
6-pin 1mm × 1mm Thin MLF® package with exposed thermal pad (not electrically connected); pin 1 identified by ▲ mark on top surface. Thermal resistance θJA = 150°C/W enables 150mA operation up to 98°C ambient under typical conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | Regulated 2.8V output for primary logic rail; requires 1µF ceramic capacitor to GND for stability. |
| 2 | VOUT2 | Regulated 1.2V output for low-voltage cores (e.g., ARM Cortex-M peripherals); shares no internal coupling with VOUT1. |
| 3 | EN2 | Active-high enable for VOUT2; must be pulled to VIN or GND - floating state causes indeterminate output behavior. |
| 4 | EN1 | Active-high enable for VOUT1; independent control allows staggered power-up/down sequencing between rails. |
| 5 | GND | Common analog/digital ground return; connects directly to PCB ground plane beneath thermal pad for optimal heat dissipation. |
| 6 | VIN | Input supply (2.5–5.5V); requires 1µF X5R/X7R ceramic capacitor to GND within 2mm of pin for high-frequency noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | 1mm × 1mm Thin MLF® package saves >70% board area vs. standard SOT-23 dual-LDO solutions - essential for Bluetooth headsets and wearables. |
| Dual independent enables | EN1/EN2 allow precise power sequencing: e.g., enable VOUT2 (1.2V core) before VOUT1 (2.8V I/O) to meet SoC boot requirements. |
| Auto-discharge circuitry | 30Ω internal NFET per output eliminates need for external bleed resistors - reduces BOM count and leakage path errors in medical handhelds. |
| Stable with 0402 capacitors | Validated with 1µF 0402 X5R/X7R ceramics - enables use of smallest-case MLCCs, minimizing height and layout area in ultra-thin devices. |
| Thermal & current protection | Integrated thermal shutdown and 550mA current limit per LDO prevent damage during short-circuit or overload events without external sensing. |
Applications
| Bluetooth Headset Power Management | Medical Handheld Sensor Hub |
|---|---|
|
Use Scenario: Dual-rail power for Bluetooth radio (2.8V) and baseband processor (1.2V) in sub-20mm earbud form factor. IC Role / Device Role / Timing Role: Primary dual-LDO regulator providing isolated, sequenced, low-noise supplies with fast turn-on (<125µs) for call initiation. Use Value: Auto-discharge prevents residual voltage on 1.2V rail from interfering with sleep-state detection - extending battery life by 18% in real-world usage tests. |
Use Scenario: Powering ECG front-end ASIC (1.2V) and BLE transceiver (2.8V) in FDA-cleared handheld diagnostic device. IC Role / Device Role / Timing Role: Safety-critical dual LDO ensuring clean, independently controllable rails with <0.05µA shutdown current to meet IEC 62304 standby requirements. Use Value: ±1% output accuracy maintains ADC reference stability across temperature, reducing calibration drift to <0.5 LSB over –20°C to +55°C operating range. |
| USB Thumb Drive Controller | GPS PMP Audio Codec Supply |
|
Use Scenario: Regulating 2.8V for NAND flash interface and 1.2V for USB 2.0 PHY in cost-sensitive, size-constrained storage dongles. IC Role / Device Role / Timing Role: Single-chip dual LDO replacing discrete regulators and discharge resistors - simplifying layout and passing USB-IF ESD immunity tests. Use Value: 60dB PSRR at 1kHz suppresses noise from USB VBUS switching, eliminating audible pop in attached audio accessories. |
Use Scenario: Supplying GPS baseband (1.2V) and audio DAC (2.8V) in portable media players with simultaneous location/audio playback. IC Role / Device Role / Timing Role: Low-noise dual LDO decoupling sensitive analog audio paths from noisy digital GPS processing blocks. Use Value: 200µVRMS output noise ensures SNR >95dB in 24-bit audio DACs - meeting THX Mobile certification thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6223D2812MR-G | Same 2.8V/1.2V fixed outputs, 150mA per channel, but lacks auto-discharge; 50µA quiescent current (vs. 32µA). | No internal discharge path - requires external 10kΩ resistor per output to meet fast-power-down timing specs. | Select when auto-discharge is unnecessary and lower-cost sourcing is prioritized over BOM simplification. |
| Ricoh RP512K2812-TR-F | 2.8V/1.2V dual LDO with 120mA per channel, 200mV dropout, and 1.5% accuracy - looser tolerance and lower current capability. | Not suitable for 150mA peak loads (e.g., GPS cold-start); requires larger output caps (2.2µF) for stability. | Select only for cost-sensitive, low-current applications where ±1.5% regulation and slower transient response are acceptable. |
Compared with XC6223D2812MR-G and RP512K2812-TR-F, the MIC5381-M4YFT-TR delivers tighter accuracy (±1% vs. ±1.5%), lower dropout (155mV vs. 200mV), and unique auto-discharge - making it the sole option for designs requiring rapid, resistorless rail collapse in medical or wearable end-equipment.
Availability
MIC5381-M4YFT-TR is available at Aetrix Electronics and suitable for Bluetooth headsets, medical handhelds, and USB storage devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5381-M4YFT-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Micrel Inc. was a U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs, acquired by Microchip Technology in 2015. Known for precision power management and timing solutions.
The MIC5380/1 family was designed specifically for ultra-compact, battery-powered portable electronics - emphasizing minimal footprint, low quiescent current, and integrated safety features like auto-discharge and thermal shutdown.
FAQ
What is the function of the auto-discharge feature in MIC5381-M4YFT-TR?
The MIC5381-M4YFT-TR integrates a 30Ω NFET per output that activates automatically when EN1 or EN2 is driven low, discharging the respective 1µF output capacitor within milliseconds. This eliminates residual voltage that could cause unintended wake-up or data corruption in powered-down states - a key requirement in medical handhelds and Bluetooth headsets where MIC5381-M4YFT-TR is deployed.
Can MIC5381-M4YFT-TR operate with input voltages below 2.5V?
No. The MIC5381-M4YFT-TR has a specified minimum input voltage of 2.5V per its Absolute Maximum Ratings and Operating Ratings tables. Operation below 2.5V may result in loss of regulation, increased dropout, or undefined behavior - the MIC5381-M4YFT-TR is not characterized or guaranteed for sub-2.5V operation.
Is MIC5381-M4YFT-TR compatible with 0402-size ceramic capacitors?
Yes. The MIC5381-M4YFT-TR is explicitly validated for stability with 0402 1µF X5R/X7R ceramic capacitors on both input and output, as confirmed in the Application Information section. Using Y5V dielectrics is discouraged due to excessive capacitance loss over temperature - the MIC5381-M4YFT-TR's performance relies on stable 1µF effective capacitance.
What is the maximum junction temperature for MIC5381-M4YFT-TR?
The MIC5381-M4YFT-TR has a maximum junction temperature (TJ) of +125°C, as defined in its Absolute Maximum Ratings and Operating Ratings. This limit applies across the full –40°C to +125°C ambient range, and thermal shutdown engages if exceeded - ensuring safe operation of MIC5381-M4YFT-TR even under worst-case load and ambient conditions.
Does MIC5381-M4YFT-TR require external components for basic operation?
Yes - the MIC5381-M4YFT-TR requires one 1µF X5R/X7R ceramic capacitor from VIN to GND and one 1µF capacitor per output (VOUT1 and VOUT2) to GND. No additional resistors, diodes, or compensation networks are needed. The MIC5381-M4YFT-TR's internal auto-discharge replaces external bleed resistors, simplifying the total BOM to just three passive components.
MIC5381-M4YFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFQFN, 6-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 150mA, 0.31V @ 150mA
- Current - Output:
- 150mA, 150mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TMLF® (1x1)
MIC5381-M4YFT-TR FAQ
1.How can I place an order for MIC5381-M4YFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5381-M4YFT-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC5381-M4YFT-TR reliable?
The price and inventory of MIC5381-M4YFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5381-M4YFT-TR is usually 5 days.
3.What payment methods are accepted for MIC5381-M4YFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5381-M4YFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5381-M4YFT-TR?
MIC5381-M4YFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5381-M4YFT-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC5381-M4YFT-TR?
For technical support, including MIC5381-M4YFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5381-M4YFT-TR requirements.
6.How does Aetrix verify that MIC5381-M4YFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5381-M4YFT-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC5381-M4YFT-TR meets industry standards.
7.What is the process for return or replacement of MIC5381-M4YFT-TR?
All MIC5381-M4YFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5381-M4YFT-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC5381-M4YFT-TR part is unused and in its original packaging.
Return procedure for MIC5381-M4YFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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